如何在express(node.js)中获取路径变量 [英] How to get path variable in express(node.js)

问题描述

我正在尝试使用 req.params 来获取路径变量"userId" 的值，但是我得到了 undefined (如果有的话)指导我解决这个问题，我将非常感谢他.我将我的代码放在下面. 我已经看过一些示例，但是那些示例也在以这种方式运行，我不知道我的代码出了什么问题.
谢谢你，

I am trying to get value of path variable "userId" using req.params but i am getting undefined, if any one can guide me in this problem i ll be very thankful to him. i have place my code below. i have go through some example but those examples are also doing in this way i don't know what is going wrong with my code.
thank you,

控制器的父路由器

app.use("/user/:userId/group",groupController);

控制器中的动作

Router.post("/", function (req, res, next) {

    var group = new Group(req.body);

    console.log(req.params);

    group.userId = req.params.userId;

    group.save(new dataCallbacks(req, res, next, "Group").insert());
});

推荐答案

我认为您的路线有误，无法路由至/user/:userId/group并发布至/这没有任何意义.我的意思是要获取userId param，您应该发布到/user/:userId/group:

I think you are wrong with your route, you can't route to /user/:userId/group and post to / that doesn't make sense. I mean to get userIdparam, you should post to /user/:userId/group:

路由文件route.js:

var ctrl = require('controller.js');

app.route('/user/:userId/group').post(ctrl.doIt);

控制器文件controller.js:

exports.doIt = function(req, res, next) {
    var group = new Group(req.body);

    console.log(req.params);

    group.userId = req.params.userId;

    group.save(new dataCallbacks(req, res, next, "Group").insert());
});

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